Ian McKeever (born 1946)
is a listed UK artist known for 'assembly' paintings of mixed media.
This piece has a current value of £5,000 to £7,000 based on recent sales of
similar work (see attached photo of a 1983 oil on paper, 99" x 62", sold for £9,000).
I did not see a catalog or receipt in your pictures, so I do not know how this compares to what you paid.
To sell the piece, I would suggest contacting Sotheby's London via their website since they
have had the best results with his work.
To finish, I will need you to click the five stars at the top of your screen and hit the submit button, thanks!